Improvement in the manner of constructing molds for casting butt-hinges



KUNITED Sfrlvrns PATnNrOrnicn. i

THOS. SHEPHERD AND THOS. LOBING, OF SOUTHWARK, PENNSYLVANIA.

IMPROVEMENT lN THE MANNER 0F CONSTRUCTING MOLDS FOR CASTING BUTT-HINGES.

Specification forming part of Letters Patent No. 2,005, dated March 16,1841.

To all; vwhom, t may concern:

Be it known that we, THoMAs SHEPHERD and THOMAS LORING, of the Districtof Southwark, in the county of Philadelphia and State of Pennsylvania,have invented a new and useful improvement in the manner ofmanufacturing butt-hinges by casting them in combined metallic molds ofa particular construction; and we do hereby declare that the followingis a full and exact description thereof.

Ve construct our molds of iron, placing one mold upon another so as toform tiers, one above th'e other, and in each mold at each pouring wecast a half-hinge, the molds containing` in the first pouring a patternwhich occupies one-half thereof, and which is so constructed that it canbe readily removed, leaving the half-hinge iirst cast still in the mold,and we then, by a second pouring, cast the second halves ofthe hinges.Instead of a joint-pin we usually cast the knuckles of one half thehinge with conical depressions or countersinks, which are to receiveconical projections on the knuckles of the other half; but, ifpreferred, joint-wires may be inserted in the ordinary way, therespective halves being cast without conical projections.

In the accompanying drawings we have shown a combined mold for castingsix halfhinges only at each pouring; but we intend 'usually to cast fromtwelve to eighteen, the number being limited only by what may be i'oundpractically convenient, the particular construction not varying with thenumbercast at one operation.

Figure l is a perspective View ofthe mold, A being the gate throughwhich the metal is poured, which gate slidesin betweentwo tiers ofmolds, B B, which are held together by a band, B', and this may betightened by a cam at C. The screws D D press and hold the respectivetiers of molds together, said molds being surrounded by a casing, E E,for keeping themin place at the time of casting.

Fig. 2 shows the upper part of one of theindividua-l molds, having uponit the pattern of a half-hinge of ve knuckles as divided into partsforthe purpose of removing it from the mold after a half-hinge has beencast against it, the knuckles being furnished with conical protuberancesand depressions in lieu of the ordinary joint-pin. F is the body ofthemold, the lower side of which has a plain surface,

y place.

.and forms the top of the mold next belowy it, against which the back ofthe hinge is cast. The upper surface of the mold has four-or anyotherdesired number of protuberances, a a a a, which i'orm the countersinksfor screwheads, and it also has a flute o'r concavity, b, for formingthe knuckles or barrels oi' the hinge'. The pattern half-hinge c c isshown as divided into tive parts by sections across it, leaving themiddle piece,- c, wedge formed, so that it may easily be slipped out,when c c may be readily removed. In the half-hinge, Fig. 3, d d are theconical projections and the dotted lines e e the conical depressions.Vhere there are but three knuckles to the hinge, the

pattern will admit of a more simple division. In Fig. 4 it is shown lasdivided into three parts only, the remoual of wedge-piece c admitting.of the delivery of thc conical protuberances dd,- or if the'half Fig.4L becast iirst, the pattern which occupies the other half of the moldshould be divided into two parts only by a section across its middle. Bymaking the section obliquely instead of vertically through a patternlike Fig. 4, it may be made `to deliver when divided into two partsonly.

Such a'sectipn is shown at f f, Fig. 5.

f The gate A is made in two parts, and has through each of its sidesslots or openings opposite to the space in each mold, into which themetal is to be poured, as shown atg g g, Fig. 6, which is a view of thegate lremoved from its place between the tiers of molds.

When this compound moldis to beused,the patterns are placed on the sideopposite to that in which the metal is to be poured, and the firsthalves of the hinges are then cast.

Vhen these have cooled the patterns are to be removed, the casthalf-hinge remaining in The molds arethen to be put together, asbeforefexcepting that the sides which contained the patterns are tocoincide with the openings in the gates for the purpose of castingtheremaining'half-hinges. When the casting has been thus completed andthe hinges removed from the mold, they are to be annealed in the mannerwell known to ironfounders.

Having thus fully described the nature of our invention and shown howthe same is to be carried into operation, what we claim therein, anddesire to. secure by Letters Patent, is-

l. The manner in which We have construct` ed and combined the respectiveparts of our combined metallic mold for casting butt hinges, as aboveset forth-that is to say, the constructing of metallic molds so as toarrange them in tiers one above the other on each side of a metallicgate, and so as thatthe said molds shall contain at the time of the rstcasting the patterns in the form of a half-hinge divided so as todeliver readily from the cast half, as herein described.

2. The manner of combining these molds so as that the lower sides of thepieces F shall constitute the half-,mold for each hingein the series,and likewise the so forming and arranging them as to render them capableof being reversed for the purpose of casting the second half of thehinge, the whole4 being formed, constructed, and operating substantiallyas herein fully made knowm THOS. SHEPHERD.

` THOS. LORING.

` Witnesses:

WM. W. RABBIT, A. H. DENcKLA.

